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Reinforcer devaluation abolishes conditioned cue preference: evidence for stimulus-stimulus associations
1Department of Psychology, University of California, Los Angeles 90095-1563, USA. hyin@ucla.edu
Behavioral Neuroscience
|March 16, 2002
Summary
Rats learned to prefer cues linked to food rewards. However, when the food
Area of Science:
- Behavioral neuroscience
- Learning and memory
Background:
- The conditioned cue preference (CCP) task demonstrates how cues paired with rewards create preference.
- Understanding the learning mechanisms in CCP is crucial for behavioral research.
Purpose of the Study:
- To investigate whether the stimulus-reinforcer association in CCP is dependent on the current motivational state of the reinforcer.
Main Methods:
- Rats underwent training in a radial arm maze, associating a specific arm cue with a food reward.
- Post-training, one group of rats experienced taste aversion to the food reinforcer, while control groups received saline or unpaired lithium chloride.
- Preference for the cued arm was assessed after reinforcer devaluation.
Main Results:
- Rats in the control groups (saline and unpaired) maintained a preference for the previously reinforced cue.
- Rats that underwent taste aversion (devalued group) exhibited an aversion to the previously reinforced cue.
- This indicates that the learned preference is directly tied to the value of the reinforcer.
Conclusions:
- Conditioned cue preference is mediated by the association between the stimulus and the reinforcer.
- Devaluing the reinforcer abolishes the learned preference, highlighting the role of the stimulus-reinforcer association in CCP.
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